1. Introduction and Overview
Thank you for choosing the BESTEK MRC686C Multi-Port USB Car Charger. This device is designed to provide efficient and safe charging for multiple electronic devices simultaneously within your vehicle. It features a combination of USB-C Power Delivery (PD), Quick Charge (QC), and standard USB-A ports to accommodate a wide range of smartphones, tablets, laptops, and other USB-powered gadgets.

The BESTEK MRC686C Multi-Port USB Car Charger, featuring a compact design and a detachable cigarette lighter power cord for vehicle use.
2. Product Features
- High Power Output: Total 125W output for rapid charging across all ports.
- Multiple Charging Ports: Equipped with 3 x PD30W USB-C ports, 1 x QC3.0 18W port, and 2 x 2.4A intelligent recognition USB-A ports.
- Universal Compatibility: Supports a wide range of devices including smartphones, tablets, laptops, game consoles, and more.
- Vehicle Compatibility: Operates with 12V to 24V car power systems, suitable for cars, SUVs, vans, and trucks.
- Advanced Safety Features: ETL certified with built-in protections against overcurrent, overload, and short-circuit.
- Smart Identification: Automatically detects connected devices to deliver optimal charging speed.
- Compact Design: Space-saving form factor for convenient placement in your vehicle.

An illustration detailing the various charging ports on the BESTEK MRC686C, including three USB-C PD30W ports, one QC18W port, and two 2.4A USB-A ports, totaling 125W output.

The BESTEK MRC686C car charger installed in a vehicle, demonstrating its ability to simultaneously charge multiple devices for both front and rear seat passengers.
3. Package Contents
Please check the package for the following items:
- 1 x BESTEK MRC686C 6-Ports Car USB Charger
- 1 x 2.6ft Car Cigarette Lighter Power Cord
- 1 x User Guide (this document)
4. Setup Instructions
- Connect the Power Cord: Insert the DC plug of the 2.6ft power cord into the power input port on the side of the BESTEK MRC686C charger unit.
- Insert into Vehicle Socket: Plug the cigarette lighter end of the power cord firmly into your vehicle's 12V-24V cigarette lighter socket. Ensure a secure connection.
- Power On: Once connected, the charger is ready for use. Some vehicles may require the ignition to be on for the cigarette lighter socket to provide power.
- Position the Charger: Place the charger unit in a convenient and stable location within your vehicle, ensuring it does not obstruct driving or safety features. The compact design allows for flexible placement.
5. Operating Instructions
The BESTEK MRC686C charger is designed for simple plug-and-play operation. It features various port types to optimize charging for different devices.
5.1 Charging Your Devices
- USB-C PD30W Ports (C1, C2, C3): Use these ports for devices that support USB Power Delivery, such as modern smartphones, tablets, and some laptops, for the fastest possible charging.
- QC3.0 18W Port (A1): This port is ideal for devices compatible with Quick Charge 3.0 technology, providing rapid charging for supported Android phones and other gadgets.
- 2.4A USB-A Ports (A2, A3): These intelligent recognition ports are suitable for charging a wide range of standard USB devices, including older smartphones, smartwatches, and other accessories. The charger will automatically detect the device and deliver the optimal current up to 2.4A.
Simply connect your device's charging cable to the appropriate port on the charger. The charger's smart identification chip will automatically detect your device and deliver the fastest safe charging speed.

A visual representation of the charger's smart multi-charging capability, showing six different mobile devices connected and receiving power simultaneously.

This image highlights the fast charging capabilities of the PD30W ports, showing a smartphone reaching 75% charge in 30 minutes and another reaching 80% in 30 minutes.
6. Safety Information
Your safety is paramount. Please read and adhere to the following safety guidelines:
- Do not expose the charger to water, moisture, or extreme temperatures.
- Avoid dropping, disassembling, or attempting to repair the charger yourself.
- Ensure the charger is securely plugged into the vehicle's cigarette lighter socket to prevent loose connections.
- Do not use the charger if it appears damaged or if the power cord is frayed.
- Keep out of reach of children.
- The charger is ETL certified and incorporates multiple safety protections including overcurrent, overload, and short-circuit protection to ensure safe operation.
7. Maintenance
To ensure the longevity and optimal performance of your BESTEK MRC686C car charger, follow these simple maintenance tips:
- Cleaning: Disconnect the charger from the power source before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid cleaners or aerosols.
- Storage: When not in use for extended periods, store the charger in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Care: Avoid bending or crimping the power cord excessively. Always grasp the plug, not the cable, when disconnecting.
8. Troubleshooting
If you encounter issues with your charger, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not powering on/no charging | Loose connection; vehicle socket not active; blown fuse in vehicle. | Ensure the charger is firmly plugged into the cigarette lighter socket. Check if the vehicle's ignition needs to be on. Consult your vehicle manual for cigarette lighter fuse location and replacement. |
| Slow charging | Using an incompatible port; cable issue; device drawing too much power. | Ensure you are using the correct port (e.g., PD30W for fast charging). Try a different charging cable. Disconnect other devices to reduce overall load. |
| Device not recognized | Faulty cable; device issue. | Try a different charging cable. Test the device with another charger to confirm functionality. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | MRC686C |
| Input Voltage | DC 12V-24V |
| Total Power Output | 125W |
| USB-C Ports (C1, C2, C3) | 3 x PD30W (Power Delivery) |
| USB-A Port (A1) | 1 x QC3.0 18W (Quick Charge 3.0) |
| USB-A Ports (A2, A3) | 2 x 2.4A (Intelligent Recognition) |
| Total USB Ports | 6 |
| Dimensions | 3.78 x 1.09 x 2.99 inches |
| Weight | 8.5 ounces |
| Safety Certifications | ETL Certified |
| Compatible Devices | Smartphones, Tablets, Laptops, Game Consoles, Smartwatches, Cameras, GPS, Headphones, Speakers |

The compact design of the BESTEK MRC686C charger is shown, fitting discreetly into a car's center console, along with its dimensions (3.78 x 1.09 x 2.99 inches).

An overview of the charger's broad compatibility, indicating it can charge a wide range of USB-powered devices and is suitable for use in 12V-24V vehicles including cars, SUVs, vans, and trucks.
10. Warranty and Support
BESTEK provides an 18-month product replacement warranty from the date of purchase. This warranty covers manufacturing defects and ensures your satisfaction with the product.
For technical assistance, product inquiries, or warranty claims, please contact BESTEK customer service. Our dedicated support team is available 24 hours a day, 7 days a week to provide friendly and helpful assistance.
Please refer to the contact information provided in your original purchase documentation or visit the official BESTEK website for the most up-to-date support details.